I can't bring myself to send a corporation a constant stream of extremely personal data when I know they absolutely will sell/leak all of it along with the countless assumptions they'll make about me using that same data.

It'd be nice to have the information a ring or watch gathers as long as it stayed local. I haven't seen many products offering that though. The thought of not being able to continuously profit from surveillance is just too painful for many companies to bother creating a product aimed at the consumer who doesn't want to be spied on I guess.

Colmi smart rings have a reverse-engineered Bluetooth protocol, so you can use Gadgetbridge instead of the official QRing app and keep everything local.

For what it’s worth the Apple Watch can store data entirely locally, or if you want sync it’s E2EE.

Exactly why I abandoned my Oura ring. I stopped wearing it for a couple of years, and when I went back, it wouldn't work without a cloud account/sync.

Pebble Index!

It’s why I have enjoyed my refurbished pebble though I won’t be getting their “index” because I just don’t want a smart ring tbh. Nice to have a slightly dumber product with better battery life and open source top to bottom.